Request headers

This is what your panel receives when mins fetches a subscription URL. Use it to tell clients apart, to enforce device limits and to choose a response per platform.

What mins sends

GET /sub/abc123 HTTP/1.1
Host: sub.example.com
User-Agent: mins/1.1.0 (android)
Accept-Language: en
x-hwid: 3f9a1c07b2d44e5e8a61c0d2f7b9e413
x-device-os: android
x-ver-os: Linux 6.1.99-android14-11 #1 SMP PREEMPT
x-device-model: localhost

Header	Value	Notes
`User-Agent`	Depends on the subscription’s preset, see below	Providers can force a value with `change-user-agent`.
`Accept-Language`	`en` or `ru`	The language set in Settings → Appearance → Language.
`x-hwid`	32 lowercase hex characters	Random identifier, generated once per installation and the same for all subscriptions on that installation. It is not derived from hardware.
`x-device-os`	`android`, `ios`, `macos`, `windows` or `linux`	Operating system of the device.
`x-ver-os`	Free text	The operating system version string as the platform reports it. The format differs between systems.
`x-device-model`	Free text	The device’s host name as the OS reports it. It is not a marketing model name and can be a generic value such as `localhost`.

The four x- headers are sent together or not at all. There are no cookies and no authentication headers: the credentials are the subscription URL itself.

User-Agent presets

The user picks a preset per subscription on the subscription screen (User-Agent). The default is mins.

Preset	`User-Agent` sent
mins (default)	`mins/<app version> (<os>)`, for example `mins/1.1.0 (android)`
Happ	`Happ/1.63.1`
INCY	`INCY/<app version>/<os>`, for example `INCY/1.1.0/android`
Xray	`Xray-core/26.10.31`
custom	Any text the user typed

<os> is the same value as in x-device-os.

Why this matters to a panel: many panels choose the response format from the User-Agent (for example JSON for Happ-like clients and a link list for others). Users who need a particular format can switch the preset. mins accepts a link list, base64, and Xray JSON, so the default mins User-Agent works with any of them; see Subscription format.

Providers can take over the choice:

Header in your response	Effect
`change-user-agent: <string>`	From the next fetch on, this exact string is sent as `User-Agent`, and the subscription shows it as the Custom User-Agent.
`manual-block-user-agent: true`	The user cannot change the preset or the custom value of this subscription.

Device identifier (HWID)

x-hwid exists so that panels can count devices and enforce device limits (for example Remnawave). It is on by default.

The user can turn it off per subscription with Send device identifier (HWID). With it off, none of the four x- headers is sent.
If your service requires the identifier, send subscription-always-hwid-enable: true. mins then tells the user that “Provider requires HWID. Turning it off may stop subscription updates; the choice remains yours.” It does not force the setting: privacy stays with the user.
The identifier lives in the app’s data. After a reinstall without restoring a backup, a new identifier is generated.
If the client cannot read its stored identifier, it refuses to update subscriptions with “Device identity unavailable; restore a backup before updating subscriptions” and does not send a new one.

Other requests mins makes

Request	Sent to	Notes
Routing profile by URL	The `https://` URL from a routing link or the `routing` key	No redirects are followed; 9 s to connect and 20 s to receive. The `x-` headers are not sent.
Geo files	The `Geoipurl` and `Geositeurl` of a routing profile	`User-Agent` is the browser string the user chose in Settings → Subscriptions → Geo files User-Agent (default: the same string as the mins preset above), or the provider’s `user-agent-geo-files`.
Ping probes	The probe URL (`check-url-via-proxy`, default `https://www.gstatic.com/generate_204`)	Through the server being measured, not to your panel.